方法1:
UPDATE lpmgmt t1 LEFT JOIN lpmgmt_other t2 ON t2.lpmgmt_id = t1.id SET t1.lpEntityType2 = t2.lpEntityType2
方法2:
update table1 set field1=table2.field1 from table2
where table1.id=table2.id
方法3:
update table1
set field1=(select top 1 field1 from table2 where table2.id=table1.id)
where table1.id in (condition)